I mean it came out that he/wikileaks were communicating and coordinating with the Trump campaign and Assange requested that Trump ask the Aus govt to appoint him as Aussie ambassador to the US as payment for helping him win.

https://www.theatlantic.com/politics/archive/2017/11/the-sec...

So many that supported him earlier don't support him anymore because he was delaying and timing leaks and selectively leaking things to help get Trump elected. I personally felt he lost the moral high ground after that.